A thermoplastic composition having improved mechanical properties

Abstract

A thermoplastic composition including a thermoplastic polymer component and at least one elastomer, wherein the thermoplastic polymer component comprises at least one propylene copolymer having a propylene content of at least 60 wt.-% and at least one ethylene copolymer having an ethylene content of at least 50 wt.-%. The invention is also directed to a sealing device comprising a waterproofing layer obtained by using the thermoplastic composition, to a method for producing a sealing device, to a method for waterproofing a substrate, and to a method for bonding a first substrate to a second substrate.

1 . A thermoplastic composition comprising:
 a) thermoplastic polymer component TP and   b) at least one elastomer E, wherein   the thermoplastic polymer component TP comprises at least one propylene copolymer TP1 having a propylene content of at least 60 wt.-%, based on the weight of the propylene copolymer and at least one ethylene copolymer TP2 having an ethylene content of at least 50 wt.-%, based on the weight of the ethylene copolymer.   
     
     
         2 . The thermoplastic composition according to  claim 1 , wherein the at least one propylene copolymer TP1 is a propylene-ethylene random copolymer based on the weight of the propylene-ethylene random copolymer. 
     
     
         3 . The thermoplastic composition according to  claim 1 , wherein the at least one propylene copolymer TP1 comprises 25-75 wt.-%, of the total weight of the thermoplastic composition. 
     
     
         4 . The thermoplastic composition according to  claim 1 , wherein the at least one ethylene copolymer TP2 is an ethylene-octene random copolymer, based on the weight of the ethylene-octene random copolymer. 
     
     
         5 . The thermoplastic composition according to  claim 1 , wherein the at least one ethylene copolymer TP2 comprises 5-45 wt.-% of the total weight of the thermoplastic composition. 
     
     
         6 . The thermoplastic composition according to  claim 1 , wherein the thermoplastic polymer component TP further comprises at least one thermoplastic polyolefin elastomer TP3 different from the at least one propylene copolymer TP1 and from the at least one ethylene copolymer TP2. 
     
     
         7 . The thermoplastic composition according to  claim 6 , wherein the at least one thermoplastic polyolefin elastomer TP3 has a flexural modulus at 23° C. determined according to ISO 178 standard of not more than 1000 MPa, and/or a melting temperature determined by DSC according to ISO 11357 standard using a heating rate of 2° C./min of at least 100° C. 
     
     
         8 . The thermoplastic composition according to  claim 6 , wherein the at least one thermoplastic polyolefin elastomer TP3 comprises 0.1-30 wt.-%, of the total weight of the thermoplastic composition. 
     
     
         9 . The thermoplastic composition according to  claim 1 , wherein the at least one elastomer E comprises at least one butyl rubber E1 and/or at least one ethylene propylene diene monomer rubber E2. 
     
     
         10 . The thermoplastic composition according to  claim 1 , wherein the at least one elastomer E comprises 0.5-35 wt.-%, of the total weight of the thermoplastic composition. 
     
     
         11 . A sealing device comprising a waterproofing layer obtained by using the thermoplastic composition according to  claim 1 . 
     
     
         12 . The sealing device according to  claim 11 , wherein the waterproofing layer has a thickness of 0.1-3.5 mm. 
     
     
         13 . A method for producing a sealing device according to  claim 11 , the method comprising melt-processing a starting composition comprising the constituents of the thermoplastic composition comprising:
 a) the thermoplastic polymer component TP and   b) at least one elastomer E, wherein   
       the thermoplastic polymer component TP comprises at least one propylene copolymer TP1 having a propylene content of at least 60 wt.-%, based on the weight of the propylene copolymer and at least one ethylene copolymer TP2 having an ethylene content of at least 50 wt.-%, based on the weight of the ethylene copolymer and melt-shaping the melt-processed starting composition into a form of a shaped article. 
     
     
         14 . The method according to  claim 13 , wherein the starting composition further comprises at least one catalyst CAT selected from the group consisting of metal oxides, metal salts of fatty acids, metal salts of boric acid, sulfur catalysts, phenol resin catalysts, fatty acids, and mixtures thereof. 
     
     
         15 . A method for waterproofing a substrate comprising steps of:
 I) providing a sealing device according to  claim 11 ,   II) applying a moisture curable adhesive composition ADH to at least a portion of a surface of the substrate and/or to at least a portion of a surface of the waterproofing layer,   III) covering the surface of the substrate with the sealing device such that the applied adhesive composition forms an interlayer between the sealing device and the substrate such that the opposing surfaces of the sealing device and the substrate are directly connected to each other via the interlayer, and   IV) curing the moisture curable adhesive composition with water.   
     
     
         16 . A method for bonding a first substrate S1 to a second substrate S2, the method comprising steps of:
 I. applying a moisture curable adhesive ADH onto a surface of at least one of the two substrates,   II. joining the substrates to each other such that the applied adhesive forms an interlayer between the two substrates such that the opposing surfaces of the substrates are directly connected to each other via the interlayer, and   III. curing the moisture curable adhesive with water,   
       wherein the first substrate S1 and/or the second substrate S2 has been obtained by using the thermoplastic composition according to  claim 1 . 
     
     
         17 . The method according to  claim 15 , wherein the moisture curable adhesive composition ADH comprises at least one polymer P containing silane and/or isocyanate groups. 
     
     
         18 . The method according to  claim 15 , wherein the moisture curable adhesive composition ADH is an adhesive composition ADH1 comprising:
 at least one polymer P1 containing silane groups,   10-40 wt.-%, based on the total weight of the adhesive composition ADH1, of at least one polymeric plasticizer PL,   0.1-5 wt.-%, based on the total weight of the adhesive composition ADH1, of at least one monomeric or oligomeric amino-functional alkoxysilane AS1, and   0.1-5 wt.-%, based on the total weight of the adhesive composition ADH1, of at least one monomeric or oligomeric C3-C20-alkyl-functional alkoxysilane AS2 or an adhesive composition ADH2 comprising:   at least one polymer P2 containing isocyanate groups,   0.5-35 wt.-%, based on the total weight of the adhesive composition ADH2, of at least one plasticizer, and   1.5-60 wt.-%, based on the total weight of the adhesive composition ADH2, of at least one organic and/or inorganic filler.